Sleep sacks and baby overheating
Can a baby sleep sack cause a baby to overheat?
ergoPouch Cocoon Swaddle Sack: A tester used it in a warm maternity ward and found the lightweight 0.2 TOG kept the baby snug without overheating. The page states the product is 0.2 TOG. The same round-up notes the correct TOG must be chosen for the season and that swaddles are only useful for a short newborn phase, performing similarly to other zip swaddles. ergoPouch Cocoon Swaddle Sack / Cocoon Swaddle Bag: The store page's structured product data records a TOG Rating of 3.5 TOG for this product. Testers of the 3.5 TOG reported their babies slept through cold nights that had previously woken them from being cold.
| Product | Why | TOG rating | Warmth in use | Arm position | Sizes |
|---|---|---|---|---|---|
| 1. ergoPouch Cocoon Swaddle Sack (the UK maker page calls it Cocoon Swaddle Bag) sold by ergopouch.com | A tester used it in a warm maternity ward and found the lightweight 0.2 TOG kept the baby snug without overheating. | The page states the product is 0.2 TOG. guide | A tester used it in a warm maternity ward and found the lightweight 0.2 TOG kept the baby snug without overheating. review | It is designed to be worn three ways: arms in, hands up, or arms out. listing | The Starbeam 0.2 TOG Cocoon is sold in three sizes: 0-3M, 3-6M and 6-12M. listing |
| 2. ergoPouch Cocoon Swaddle Sack / Cocoon Swaddle Bag sold by ergopouch.com | The store page's structured product data records a TOG Rating of 3.5 TOG for this product. | The store page's structured product data records a TOG Rating of 3.5 TOG for this product. guide | Testers of the 3.5 TOG reported their babies slept through cold nights that had previously woken them from being cold. blog | The Cocoon Swaddle Sack can be worn three ways - arms in, hands up or arms out - and is marketed as growing with the baby's startle reflex. listing | The 3.5 TOG Oatmeal Marle is listed in four sizes: 0000, 0-3M, 3-6M and 6-12M. listing |
Also cited in the text
- ergoPouch Cocoon Swaddle Sack (the UK maker page calls it Cocoon Swaddle Bag), limitations: The same round-up notes the correct TOG must be chosen for the season and that swaddles are only useful for a short newborn phase, performing similarly to other zip swaddles. review
Every value in the table is a fact RoboTrunk checked, linked to the page it came from. A dash means no checked fact fills that cell. Prices and stock change, so this page prints neither: each product name links to its RoboTrunk page, which shows them live.
Written 2026-10-16T13:41:26.042Z.
This page is published by RoboTrunk, a store built for shopping agents. The store named on this page sells the product and ships it. RoboTrunk is not the seller and never holds the money. Buying works in one path. RoboTrunk's tools prepare a checkout at that store, then hand back a short-lived link. The person approves the total; once RoboTrunk has checked the store's total against it, the person is given the checkout link to tap in their own browser, or, if the person prefers and gives permission, their agent may open the link and finish there, and payment always happens on the store's own checkout page. RoboTrunk never takes the payment or sees a card. Where the rest of this site is: - /agent/story.md is what RoboTrunk is and how it works, in full. - /agent/tools.json is every tool, its arguments and its answers. - /agent/merchants is every store you can buy from through RoboTrunk. - /products/ucp is every store's indexed products. - /products/search is one search across every store, in plain words.